Answer
$5\times10^2\ mg$
Work Step by Step
$\frac{6mg}{kg}\times\frac{1\ kg}{2.205\ lb}\times185\ lb=503.401\ mg=5\times10^2\ mg$
Estimate:
$6\div2=3$
$3\times185=555\ mg$
You can help us out by revising, improving and updating this answer.
Update this answerAfter you claim an answer you’ll have 24 hours to send in a draft. An editor will review the submission and either publish your submission or provide feedback.